September weather forecast and climate
Saint Michael, AK

Weather in September

September, the first month of the autumn, in Saint Michael, is also a frosty month, with temperature in the range of an average high of 48.9°F (9.4°C) and an average low of 40.3°F (4.6°C).

Temperature

In September, the average high-temperature marginally drops, from a moderate 57.2°F (14°C) in August, to a chilly 48.9°F (9.4°C). In September, the average low-temperature is 40.3°F (4.6°C).

Humidity

The average relative humidity in Saint Michael is 80%.

Rainfall

In Saint Michael, during September, the rain falls for 15.1 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Saint Michael, during the entire year, the rain falls for 118.6 days and collects up to 13.39" (340mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.4 snowfall days, it receives 0.16" (4mm) of snow. In Saint Michael, during the entire year, snow falls for 94.3 days, and aggregates up to 27.2" (691mm) of snow.

Daylight

In September, the average length of the day is 12.9h.

Sunshine

In September, the average sunshine is 5.3h.

UV index

The average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Saint Michael?

In Saint Michael, in September, the average high-temperature is 48.9°F (9.4°C), and the average low-temperature is 40.3°F (4.6°C).

What is the average humidity in September in Saint Michael?

In Saint Michael, the average relative humidity in September is 80%.

How many days does it rain in September in Saint Michael?

In Saint Michael, Alaska, in September, it is raining for 15.1 days, with typically 1.42" (36mm) of accumulated precipitation.

When does it start snowing in Saint Michael?

September is the first month it typically snows in Saint Michael. Throughout September, in the average 1.4 snowfall days, it receives 0.16" (4mm) of snow.

How many hours of daylight does Saint Michael have in September?

In September, the average length of the day is 12.9h.

How long on average sun shines in September in Saint Michael?

The average sunshine in September in Saint Michael is 5.3h.

How high is the UV index in September in Saint Michael?

In September, the average daily maximum UV index in Saint Michael, Alaska, is 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV rays.

Average temperature in September
Saint Michael, AK

Average temperature in September - Saint Michael, AK
  • Average high temperature in September: 48.9°F

The warmest month (with the highest average high temperature) is July (59.5°F).
The month with the lowest average high temperature is January (9.1°F).

  • Average low temperature in September: 40.3°F

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (1.8°F).

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Average pressure in September
Saint Michael, AK

Average pressure in September - Saint Michael, AK
  • Average pressure in September: 29.75"

The month with the highest atmospheric pressure is May (29.92").
The month with the lowest atmospheric pressure is October (29.72").

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Average wind speed in September
Saint Michael, AK

Average wind speed in September - Saint Michael, AK
  • Average wind speed in September: 8.5mph

The windiest month (with the highest average wind speed) is October (9.6mph).
The calmest month (with the lowest average wind speed) is June (6mph).

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Average humidity in September
Saint Michael, AK

Average humidity in September - Saint Michael, AK
  • Average humidity in September: 80%

The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is June (72%).

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Average rainfall in September
Saint Michael, AK

Average rainfall in September - Saint Michael, AK
  • Average rainfall in September: 1.42"

The wettest month (with the highest rainfall) is August (2.24").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in September
Saint Michael, AK

Average rainfall days in September - Saint Michael, AK
  • Average rainfall days in September: 15.1 days

The month with the highest number of rainy days is August (19.8 days).
The month with the least rainy days is January (2.7 days).

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Average snowfall in September
Saint Michael, AK

Average snowfall in September - Saint Michael, AK
  • Average snowfall in September: 0.16"

The month with the highest snowfall is November (4.76").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in September
Saint Michael, AK

Average snowfall days in September - Saint Michael, AK
  • Average snowfall days in September: 1.4 days

The month with the highest number of snowfall days is March (16.7 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Saint Michael, AK

Average daylight in September / Average sunshine in September - Saint Michael, AK
  • Average daylight in September: 12.9h

The month with the longest days is June (Average daylight: 20.4h).
The month with the shortest days is December (Average daylight: 4.7h).

  • Average sunshine in September: 5.3h

The month with the most sunshine is May (Average sunshine: 8.3h).
The month with the least sunshine is June (Average sunshine: 2.9h).

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Average sunshine days in September
Saint Michael, AK

Average sunshine days in September - Saint Michael, AK
  • Average sunshine days in September: 12.5 days

The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (8.4 days).

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Average UV index in September
Saint Michael, AK

Average UV index in September - Saint Michael, AK
  • Average UV index in September: 2

The month with the highest UV index is July (UV index 4).
Months with the lowest UV index are January, February, March and December (UV index 1).

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Average cloud cover in September
Saint Michael, AK

Average cloud cover in September - Saint Michael, AK
  • Average cloud cover in September: 58

The month with the most cloud cover is August (Cloud cover 62).
The month with the least cloud cover is June (Cloud cover 50).

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Average visibility in September
Saint Michael, AK

Average visibility in September - Saint Michael, AK
  • Average visibility in September: 6mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March, April and December (4mi).

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